On a dual-homed box with two 3Com 3c900 NICs and 2.2.11 working fine,I've tried 2.2.12pre1 and 2.2.12pre3 today. Output from ifconfig looksnormal. Interface eth0 works fine. Interface eth1 doesn't: if pingedfrom another box, it may or may not (mostly not) wake up and ping back,and if it does, and I ping from the local host, that may work for a bit;but very soon (under 20 seconds) the interface seems to revert toinactivity. All this time eth0 is quite normal. Taking eth1 down andbringing it back up manually with ifconfig doesn't help. Rebooting2.2.11 causes the problem to go away.

Requests for configuration details and/or try-this-and-report-backinstructions will be welcome. The kernel is SMP (two P120s).